Sorry to hear that CB, like every one said just tough it out and in time things will get better with or without your aunt.
I'd just do what you have to do in the line of house work etc. and just pay no mind to your aunt, people like that very rarely change so just do your chores and don't give her the time of day, she may not like it much but as long as you've done what had to be done around the house theres not much she can say about it.
I lived with my uncle for a year or so and thats how it was with him too, he was really pissed when I stopped talking to him but after a while he got the point and slowly changed his ways.